Modeling of PM2.5 based on the ground measurements

Tuesday, 16 December 2014
Itaru Sano1, Sonoyo Mukai2, Makiko Nakata1, Brent N Holben3 and Nobuo Sugimoto4, (1)Kinki University, Osaka, Japan, (2)The Kyoto College of Graduate Studies for Infromatics, Kyoto, Japan, (3)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (4)National Institute for Environmental Studies, Tsukuba, Japan
Our research group has been retrieving aerosol/PM characteristics based on photometry (NASA/AERONET), NIES/LIDAR, PM-sampling and satellite data. It is well known that concentration of anthropogenic aerosols in Asia is increasing with economic growth. In recent year, high concentrations of PM2.5 (particulate matter) have been recorded in western part of Japan due to trans-boundary pollutants. The DRAGON Japan field campaign was carried out in spring of 2012 in order to investigate both in-bound and local pollutants. At first, this work intends to estimate the concentration of PM2.5 from DRAGON-Japan's AERONET dataset, which provide us with useful information for the modeling of PM particles. Fine mode AOT (Aerosol optical Thickness) is highly correlated with PM2.5 concentration than total AOT. Furthermore, vertical profile of aerosols is necessary for PM modeling because PM concentration seems to be strongly correlated with the low level aerosols. To clarify this problem, 2ch LIDAR measurements are available. The NIES/LIDAR network data present the vertical profile of aerosol extinction which is available to obtain AOT profile from the columnar AOT given by AERONET. This fact suggests that combination use of vertical extinction profile by NIES-LIDAR and AOT by NASA/AERONET provides the efficient model of PM2.5. Thus our PM2.5 model includes the aerosol vertical information. That is why our retrieved PM2.5 gets to precise and practical.